caa a22 4500 605528284 CHVBK 20210128100812.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s10531-015-0951-3 doi (NATIONALLICENCE)springer-10.1007/s10531-015-0951-3 Biodiversity in the by-catch communities of the pelagic ecosystem in the Western Indian Ocean [Elektronische Daten] [N. Lezama-Ochoa, H. Murua, G. Chust, J. Ruiz, P. Chavance, A. de Molina, A. Caballero, I. Sancristobal] Diversity in the by-catch communities from the pelagic ecosystem in the tropical tuna purse seine fishery has been poorly studied. This study uses different biodiversity measures to compare drifting fish aggregating devices (FADs) and Free School sets (sets made on schools of tuna) of the Western Indian Ocean. Data was collected from observer programs carried out by the European Union between 2003 and 2010 on board Spanish and French fleets. Alpha (species diversity of a particular area) and Beta diversity (difference in species composition between different areas) was analyzed to assess differences in the number of species, abundances and the species composition between areas and fishing modes. Generalized additive models were undertaken to explore which geographical/environmental variables explain the distribution of species richness index and Shannon diversity index in both fishing modes. Results showed that by-catch species in FAD communities may be used as observatories of surface pelagic biodiversity in combination with Free School communities. FAD communities were more diverse with higher number of species (74 species) and evenly distributed than Free School communities (56 species). However, environmental variables played a more important role in Free School communities. Somalia area and Mozambique Channel were the areas with highest biodiversity rates in both fishing modes. This work contributed for the future implementation of the EAFM to manage the pelagic ecosystem in a holistic and more integrated way. Springer Science+Business Media Dordrecht, 2015 By-catch nationallicence Diversity nationallicence Purse seine fishery nationallicence Western Indian Ocean nationallicence Ecosystem Approach to Fisheries Management nationallicence Lezama-Ochoa N. AZTI Tecnalia, Portualde z/g, 20110, Pasaia, Basque Country, Spain aut Murua H. AZTI Tecnalia, Portualde z/g, 20110, Pasaia, Basque Country, Spain aut Chust G. AZTI Tecnalia, Portualde z/g, 20110, Pasaia, Basque Country, Spain aut Ruiz J. AZTI Tecnalia, Portualde z/g, 20110, Pasaia, Basque Country, Spain aut Chavance P. Centre de Recherche Halieutique Méditerranéenne et Tropicale (CRH), Institut de Recherche pour le Développement (IRD), Sète, France aut de Molina A. Instituto Español de Oceanografía (IEO), Tenerife-Canary Island, Spain aut Caballero A. AZTI Tecnalia, Portualde z/g, 20110, Pasaia, Basque Country, Spain aut Sancristobal I. AZTI Tecnalia, Portualde z/g, 20110, Pasaia, Basque Country, Spain aut Biodiversity and Conservation Springer Netherlands 24/11(2015-10-01), 2647-2671 0960-3115 24:11<2647 2015 24 10531 https://doi.org/10.1007/s10531-015-0951-3 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10531-015-0951-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lezama-Ochoa N. AZTI Tecnalia, Portualde z/g, 20110, Pasaia, Basque Country, Spain aut NATIONALLICENCE 700 1- Murua H. AZTI Tecnalia, Portualde z/g, 20110, Pasaia, Basque Country, Spain aut NATIONALLICENCE 700 1- Chust G. AZTI Tecnalia, Portualde z/g, 20110, Pasaia, Basque Country, Spain aut NATIONALLICENCE 700 1- Ruiz J. AZTI Tecnalia, Portualde z/g, 20110, Pasaia, Basque Country, Spain aut NATIONALLICENCE 700 1- Chavance P. Centre de Recherche Halieutique Méditerranéenne et Tropicale (CRH), Institut de Recherche pour le Développement (IRD), Sète, France aut NATIONALLICENCE 700 1- de Molina A. Instituto Español de Oceanografía (IEO), Tenerife-Canary Island, Spain aut NATIONALLICENCE 700 1- Caballero A. AZTI Tecnalia, Portualde z/g, 20110, Pasaia, Basque Country, Spain aut NATIONALLICENCE 700 1- Sancristobal I. AZTI Tecnalia, Portualde z/g, 20110, Pasaia, Basque Country, Spain aut NATIONALLICENCE 773 0- Biodiversity and Conservation Springer Netherlands 24/11(2015-10-01), 2647-2671 0960-3115 24:11<2647 2015 24 10531